Automatic bobbin-change device for looms.



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AUTOMATIC BOBBIN CHANGE DEVICE FOR LOOMS. APPLICATION FILED MAY 1. 1914 1,152,250. Patented Aug. 31, 1915.

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AUTOMATIC BOBBIN-CHANGE DEVICE FOR LOOMS.

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Specification of Letters lP atent. Pateiltedrhug. 3T,

Application filed May "1, 1914. Serial No. 836,988.

To all whom it may concern Be it known that I, J EAN CHARLES ALFRED VVENNING, a subject of the Emperor of Ge'rmany, and residing at Miilhausen, Alsatia, Germany, have invented new and useful Improvements in Automatic Bobbin-Change Devicesfor Looms, of which the followlng is a full, clear, and exact specification.

This invention relates to improvements in automatic bobbin change devices for automatic weaving looms, wherein the bobbins are carried by a flexible band.

An arrangement is already known-comprising a kind of flexible band in the form of an endless'chain composed of articulations, each of which bears a bobbin; this chain is upheld and controlled by toothed wheels which are moved one division forward at each change of bobbin by means of a pawl connected to the transferring hammer (transferrer) but'this arrangement is very complicated and relatively clumsy;

moreover, the replacement of the empty chain u I a inovable stop'lever M controlled by the .transferrer E and engaging by its forward by a new one supplied with bobbins presents certain difficulties so that it cannot be effected while the loom is at work. p

The construction which forms the object of the present invention differs essentially from that above mentioned in the feature that the bobbins are fixed upon a flexible band of leather, very thin steel plate or the like, which band is freely placed upon a fixed inclined guide plane, so that it slides downward thereon at each change of bobbin, impelled simply by its own weight and that of the bobbins. This arrangement does not require mechanism of any kind to cause the sliding downward of the bobbin carrying band upon the inclined plane and it cannot therefore be surpassed in simplicity. Moreover, in comparison with other known mechanisms wherein each bobbin is placed in a special holder which slides freely on the slide of a charger, it possesses the advantage of requiring only one single operation to fix the bobbin upon the bobbin-holding band.

The annexed drawing shows two con structions of the improved device.

Figure 1 is a side elevation of the flexible band provided with bobbin holders in form of clasps. Fig. 2 shows the band in plan view, bearing the bobbins and placed upon the fixed guide plane. Fig. 3shows the same parts in transverse section on the line :12-a2 Fig. 4 shows a diagram of the feed device in relation to the movable transferrer of a loom. Fig. 5 shows another construction of the flexible band having gripping or'guiding pins for the bobbins.

The bobbin holders A have preferably the form of clasps for holding the bobbins (Figs. 1, 2 and 3) and are fixed on the under side of thefiexible band B at regular distances depending on the diameter of the full bobbins C. The band 13 provided with the bobbins C is arranged withthese bobbins downward upon an inclined guide plane'D fixed to the loom, having aU- shaped cross section so as to form a guide channel and upon which the band with the bobbins can slide downward impelled by its own weight and that of the bobbins, toward the charging apparatus, to convey the bobbins successively under the movable transferring hammer E (see Fig. 4-). In the position wherein the bobbin ready for being transferred lies under said transferring hammer E, the bobbin'band B is stopped bv ing released therefrom, when the transferrer E is lowered, said transferrer being to this end provided with a screw stop 0 bearing on the rear end of the stop lever M. The intermittent advanceof the bobbin band B corresponding to the distance of two adjacent bobbins takes place after each change of bobbin; the band B (Fig. 4) which discharges successively will continue in this way to slide downward in the guide channel D and upon the front of the frame of the loom, while another similar band newly suppliedwith bobbins is placed in an overlap ping condition, at F, after the. almost empty band B so as to insure the continuous supply. The empty band can then be removed and supplied again with full bobbins, so that it can be placed in the prolongation of the discharging band.

In place of the clasp-like bobbin holders A, there may also be fixed upon the band B two parallel rows of gripping or holding pins G (Fig. 5) at distances corresponding to the diameter of the full bobbins. The pins of the left row will engage in grooves provided for this purpose at the head of the weft carriers so as to prevent any lateral displacement of the bobbins, whereas the clasp-like holders or the pins is not only to firmly grip or hold the bobbinsbut also to keep them at equal distances apart and parallel to one another in order to guide them in this position to. theautomatic transferrer E, so that the latter may easily transfer the correctly positioned bobbins into the shuttleof the loom.

, What I claim is f 1. In an automatic bobbin change device for looms, a movablefleXible band, a series ofbobbin holding members on said band, a movabletransferrer for transferring the bobbins into the shuttle, and a fixed inclined guide plane on which said flexible band with the bobbins is freely placed so as to slide thereon downward by. its own weight after each change. of bobbin.

2; In an automatic bobbin change device for looms, a movableflexible band, a series of bobbin holders inform of claspsfixed on I said band, a movable transferrer, for transferring the bobbins into the shuttle, and a fixed inclined guide plane on which said 7 flexible band with the bobbins turned downward is freely placed so as to slide thereon downward by its own weight after each change of bobbin.

3. In an automatic bobbin change device for looms, a movable flexible band, a series of bobbin holding members on said band, a

movable transferrer for transferring the bobbins into the shuttle, and a fixed inclined guide channel wherein said flexible band with the bobbins is freely placed so as to slide therein downward by its own weight after each bobbin change.

4;. In an automatic bobbin change device for looms, a movable flexible band, a series of bobbin holding members on said band, a movable transferrer for transferring the bobbins into'the shuttle, a fixed inclined guide plane on which said flexible band with the bobbins is freely placed so as to slide thereon downward by its own Weight and a stop for so positioning the bobbin band that a bobbin thereof is ready for being transferred by said transferrer.

In witness whereof I have hereunto signed my name this 27 day of April, 1914, in the presence of two subscribing witnesses.

JEAN CHARLES ALFRED WENNING.

-Witnesses:

PHILIP HOLLAND, AMAND RITTER.

Copies of this patent may be obtained for five cents each, by addressing the f Commissioner of Patents,

. Washington, D. G. 

